If Anyone calls this guy a "Fool" you're a Conservative!..
LOL... that's quick!
IMO... setting aside any political preferences or views, Rick Warren is a pastor of a Christian Church. It is his duty as any other pastor or any other Christian to welcome individuals to their house of worship. I'm very sure that lots of sane minded folks in the congregation will not vote of Hillary Clinton, even if Rick endorses her which I don't think he's insane enough to do that.
There might be some "weird stuff" about Rick's political opinions lately that does not represent most of Christian Conservative's views but as far as his contribution to spreading the Good News is concern, I'm still thankful to God about the man.